Eirikite
A valid IMA mineral species
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About Eirikite
Formula:
KNa6Be2(Si15Al3)O39F2
Colour:
White to colorless
Lustre:
Vitreous, Silky
Hardness:
6
Specific Gravity:
2.59
Crystal System:
Trigonal
Member of:
Name:
Named after Eirik Raude (950-1003), discoverer of Greenland and father of Leiv (Leif) Eiriksson, after whom leifite is named.
Leifite Group.
The K analogue of leifite and telyushenkoite.
Not to be confused with the discredited "erikite".
The K analogue of leifite and telyushenkoite.
Not to be confused with the discredited "erikite".
Unique Identifiers
Mindat ID:
36060
Long-form identifier:
mindat:1:1:36060:7
GUID
(UUID V4):
(UUID V4):
15fdb4a0-f01c-4085-beef-f0a28dbf61f1
IMA Classification of Eirikite
Approved
Approval year:
2007
First published:
2010
Classification of Eirikite
9.EH.25
9 : SILICATES (Germanates)
E : Phyllosilicates
H : Transitional structures between phyllosilicate and other silicate units
9 : SILICATES (Germanates)
E : Phyllosilicates
H : Transitional structures between phyllosilicate and other silicate units
76.2.11.3
76 : TECTOSILICATES Al-Si Framework
2 : Al-Si Framework Feldspathoids and related species
76 : TECTOSILICATES Al-Si Framework
2 : Al-Si Framework Feldspathoids and related species
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Eir | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Eirikite
Vitreous, Silky
Colour:
White to colorless
Streak:
White
Hardness:
6 on Mohs scale
Tenacity:
Brittle
Cleavage:
Distinct/Good
{1010}
{1010}
Fracture:
Irregular/Uneven, Conchoidal
Density:
2.59(1) g/cm3 (Measured) 2.577 g/cm3 (Calculated)
Optical Data of Eirikite
Type:
Uniaxial (+)
RI values:
nω = 1.517(1) nε = 1.521(1)
Max Birefringence:
δ = 0.004
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Low
Pleochroism:
Non-pleochroic
Chemistry of Eirikite
Mindat Formula:
KNa6Be2(Si15Al3)O39F2
Crystallography of Eirikite
Crystal System:
Trigonal
Class (H-M):
3m (3 2/m) - Hexagonal Scalenohedral
Space Group:
P3m1
Setting:
P3m1
Cell Parameters:
a = 14.3865(9) Å, c = 4.8733(4) Å
Ratio:
a:c = 1 : 0.339
Unit Cell V:
873.50 ų (Calculated from Unit Cell)
Z:
1
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0017881 | Eirikite | Larsen A O, Kolitsch U, Gault R A, Giester G (2010) Eirikite, a new mineral species of the leifite group from the Langesundsfjord district, Norway European Journal of Mineralogy 22 875-880 | 2010 | Langesundsfjord district, Norway | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
4.710 Å | (29) |
4.153 Å | (21) |
3.386 Å | (70) |
3.161 Å | (100) |
3.115 Å | (17) |
2.466 Å | (31) |
2.398 Å | (19) |
2.217 Å | (20) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 4b: Highly evolved igneous rocks | >3.0 |
35 : Ultra-alkali and agpaitic igneous rocks |
Type Occurrence of Eirikite
General Appearance of Type Material:
finely or coarsely fibrous, monomineralic aggregates up to several centimetres across
Place of Conservation of Type Material:
Department of Geology, Natural History Museum, University of Oslo (catalogue no. 41773).
Geological Setting of Type Material:
A nepheline-syenite pegmatite
Associated Minerals at Type Locality:
Reference:
Larsen, A.O., Kolitsch, U., Gault, R.A., Giester, G. (2010): Eirikite, a new mineral species of the leifite group from the Langesundsfjord district, Norway. European Journal of Mineralogy, 22, 875-880.
Synonyms of Eirikite
Relationship of Eirikite to other Species
Member of:
Other Members of this group:
Leifite | (Na,H2O)Na6[Be2Al2(Al,Si)Si15O39]F2 | Trig. 3m : P3m1 |
Telyushenkoite | (Cs,Na,K)Na6[Be2Al3Si15O39]F2 | Trig. 3m (3 2/m) : P3 1m |
Common Associates
Associated Minerals Based on Photo Data:
6 photos of Eirikite associated with Zircon | Zr(SiO4) |
4 photos of Eirikite associated with Leifite | (Na,H2O)Na6[Be2Al2(Al,Si)Si15O39]F2 |
4 photos of Eirikite associated with Analcime | Na(AlSi2O6) · H2O |
4 photos of Eirikite associated with Polylithionite | KLi2Al(Si4O10)(F,OH)2 |
3 photos of Eirikite associated with Microcline | K(AlSi3O8) |
3 photos of Eirikite associated with Aegirine | NaFe3+Si2O6 |
2 photos of Eirikite associated with Natrolite | Na2Al2Si3O10 · 2H2O |
2 photos of Eirikite associated with Rhodochrosite | MnCO3 |
1 photo of Eirikite associated with Gaidonnayite | Na2Zr(Si3O9) · 2H2O |
1 photo of Eirikite associated with Catapleiite | Na2Zr(Si3O9) · 2H2O |
Related Minerals - Strunz-mindat Grouping
9.EH.05 | Manganoneptunite | KNa2Li(Mn2+)2Ti2[Si4O12]2 |
9.EH.05 | Neptunite | KNa2Li(Fe2+)2Ti2[Si4O12]2 |
9.EH.05 | Watatsumiite | KNa2Li(Mn2+)2V4+2[Si4O12]2 |
9.EH.05 | Magnesioneptunite | KNa2Li(Mg)2Ti2[Si4O12]2 |
9.EH.05 | Rotherkopfite | KNa2Fe2+(Fe2+)2(Ti1.5Fe2+0.5)[Si4O12]2 |
9.EH.10 | Grumantite | Na(HSi2O5) · H2O |
9.EH.15 | Sarcolite | Na4Ca12Al8Si12O46(SiO4,PO4)(OH,H2O)4(CO3,Cl) |
9.EH.20 | Ussingite | Na2AlSi3O8OH |
9.EH.25 | Leifite | (Na,H2O)Na6[Be2Al2(Al,Si)Si15O39]F2 |
9.EH.25 | Telyushenkoite | (Cs,Na,K)Na6[Be2Al3Si15O39]F2 |
9.EH.30 | Nafertisite | Na3Fe2+10Ti2(Si6O17)2O2(OH)6F(H2O)2 |
9.EH.35 | Veblenite | KNa(Fe2+5Fe3+4Mn7)Nb4(Si2O7)2(Si8O22)2O6(OH)10(H2O)3 |
Fluorescence of Eirikite
none
Other Information
Notes:
insoluble in warm 6 M HCl, melts relatively easily using a gas torch, leaving a white, vesicular globule
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Eirikite
mindat.org URL:
https://www.mindat.org/min-36060.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Eirikite
Reference List:
Larsen, Alf Olav, Åsheim, Arne (1995) Leifite from a nepheline syenite pegmatite on Vesle Arøya in the Langesundsfjord district, Oslo Region, Norway. Norsk Geologisk Tidsskrift [Norwegian Journal of Geology], 75 (4) 243-246 As leifite
Localities for Eirikite
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
Struck out - Mineral was erroneously reported from this locality.
Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
Canada | |
| Can. Museum of Nature & Horváth ... +1 other reference |
HORVÁTH (2009) | |
Norway (TL) | |
| Larsen et al. (2010) |
Russia | |
| In Coll. Martin Slama |
| Pavel.M. Kartashov (n.d.) |
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Eudidymite-Epididymite locality, Vesle Arøya, Larvik, Vestfold, Norway